Q117
General ScienceBiology
Amount of O2 normally carried by 100 ml of pure human blood is
- a.40 ml
- b.10 ml
- c.20 ml
- d.30 ml
Answer: (C) 20 ml
Arterial blood carries about 20 ml of oxygen per 100 ml: there is about 15 g of haemoglobin in 100 ml of blood and each gram binds about 1.34 ml of oxygen; about 97 per cent of the oxygen travels as oxyhaemoglobin and the rest dissolved in plasma. Under normal resting conditions every 100 ml of blood delivers about 5 ml of oxygen to the tissues.